Atmospheric gas-burner.



J. LITLE, JL. ATMOSPHERIC GAS BURNER.

I APPLICATION FILED AUG. 3Q, 1905- Patented 001;.20

PATENT OFFICE.

UNITED sTATES Specification of Letters Patent. Application filed August so, 190;. Serial o. 2745,5449.

THOMAS J. LITLE, 'JE, OF PHILADELPHIA, PENNSYLVANIA, A'SSIGNOR ro WELsBAcH LIGHT COMPANY, OF GLOUCESTER CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

Arnosrxmnrc oAs-mm'xnn.

' latented Oct. '20, 1908. l

To all whom it may concern:

. Be it known that I, THo As' J. Luna, Jr., of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a.new and useful Improvement in Atmospheric Gas-Burners, of which the fol lowing is a full, clear, and exact description, reference .be' had to the accompanying drawings, forming part of this specification, in whic Figure l isa side elevation rtlyv in sec tion-illustrating' an atmospher cburner embodying one form of my. inventionyFig. 2 is a partial sectional view of the same, showing the parts in a different position; Fig. 3

- 1s a sectional view of the-modified form;

- part offFig. 5;

Fig. 4 is an enlar ed detail viewshowin a ig. 5 is a sectional view showing another modification oi the invention; and: 'Fig. 6 is a sectional elevation showing the burner in place.

- In the operationof atmospheric gas burners employed with incandescent mantles, in

which the gas previous] to its ignition ismixed with a 'su ply 0 air, difliculty has been experienc because the conditions which exlst when the burner is first ignited diflFer from those existing after the burner has become heated. Special diflicultiw are also met in using such burners in an inverted sition, since the air will flow down a urner tube much more sluggishly when the tube is hot than when it 1s cold, and the efiectof the heat is to diminish the 'nelativ" proportion of air. Therefore, if the-burner inlets are so proportioned as to' fadmit a proper supply of air for the initiallighting, the proportion of air in the mixture will become too small after the burner has beenlighted; and if they be constructed to .de-.

liver a proper pro rtion '.of air for. the normal operation 0- the burher, the su ply of air at-the li hting period will be un uly large, and the urner will flash back when ignited, or it may even be impossible to igmte the burner except by repeated applications of a,fiame.

- My inifention overcomesthese' and other difliculti'es and provides for automatically reducing the relative pro ortion of air at the time of ignition, there y avoidin flashbacks; while the relative amount 0 :airis incg gsed during the normal action of the hu er, so as to provide the proper amount of" air at such time.

It consists of a thermostatic device having at least a portion thereof in the feed chanpreferably in the form of an impedance, the thermostatic device being arranged to reduce the relative amount of air during 1'gn1- air in the mixture during normal operation when the parts are heated. I

The invention is es ccially valuable for the inverted types of? urners using incandescin mantles.

In the several figures of the drawings, A is an inverted atmospheric burner, WhlCh is provided with a thermostatic impedance'deflow 0 air in theiinitial, operation of the burner.

In Figs. 1 and 2, which; show my pre: ferred form, 12 represents a cone constructed of thermostatic ,material and split through its apex. This cone is placed in the burner tubebetween the burner tip-and, the air.

sumes a conical form with theslits of com aratively. small size as shown un Fig. 1. Vhenthe burnerfiaeold it constitutes an impedance to the'burner feed and ope'rates to prevent flash ba'ck in two ways: first, by throttling thegburner feed and reducing the relative amount of air in the flame" assing back, owing toits forami- ,nous character. As the burner radually Eheats u after lighting, the part b, y reason (of its't ermost'atic character, automatically opens, substantially as shown in Fig. 2, and

burher feed: The pro rti'on ofair is thus giincreased to the desire amount and the'mixture may burn in the ordinary way.

'In Figs; 3 and 4, the thermostatic impedance-comprises a deflector c, carried by a thermostatic arm d, secured as by means of a thimblec', withinthe atmos heric burner which it obstructs the jet of. gas issuing from the jetorifice f, and thus limits the amount of air drawn into the burner.

shifts the deflector or baffle 0, toward the inner wall-of the burner and thus steps or reduces its action on the burner feed.

In the for mjof Figx o, thethermostatic tion' and to increase the relative amount of supply inlet or inlets, and when cold it, as-

then substantially ceases to obstruct the tube. When the burner i'scol the deflector .ioc'cupies the 3 position shown inl 'Fig. 3, iii" Afterthe burner becomes heated, the thermostatic arm 03 nel for the mixture of air and gas, and

vice, o crating to' throttle or restrict the mixture; and-second, bypreventing the ios arm 9 operates updn the movable member h of the air shutter, serving to reduce the area of air inlet when the .burner is 'oldand gen-.7

large the air inlet areawhen the burner is warm, thus controlling the entering air and reducing its proportion'at the time of igni- "tion. i

In Fig. 6, irepresents the glass globe, j the'holding means for the same, and m the mantle.

The advantages of my invention result from preventing flash-backs at the time of of the prongs in'this form clears Q and arrangement at t e thermostat and itstion.

lighting by reducin the proportionof air in the mixture, whi e at the sametime affording the proper proportions of air and. gas during the normal operation. In the preferred form, the impedance character of the thermostat also aids in avoiding flashbacksduring lighting, it then being shifted or removed to avoid clog ing or carbonizmg. The opening. and c osmg movements material -collectin thereon.

By the words 1n the channel for the mixture feed in, the claims I do not intend to restrict myself to placing the thermostatic device or thermostatically controlled impedance entirely within this tube';.but to recite that operating parts thereof are in said channel. I

Many variations ma be made in the form position without departing from my inven- I claim: 11. An atmospheric gas burner having a thermostatic device located inthe channel for the mixture feed, said device being arranged to reduce the proportion of 'air at the them of any time of ignition and to increase the properthe normal operation of the burner; substantially as described.

2. An atmospheric/ as burner having a thermostatically contmfiled impedance in the prevent flash-backs at the time of ignition, theimpedance being shifted by the action of .heat for the normal operation of the burner, substantially as described.

\ 3. An atmospheric gasburner having a thermostatic impedance in the channel for the mixture feed, said impedance beingartime's, substantially as described. v

4. An atmospheric gas burner of the inaction of heat, substantially as described. In testimony whereof I have hereunto signed my name.

THOMAS J. mam...

Witnesses:

. W. J. JACKSON, K. M. QILLIGAN.

tion. of air under' the influence of heat for channel for.the mixture Tfeed arranged to ranged 'to allow a flow of themixture at allverted type having a thermostatically-com 4 projecting'prongs arranged to spread un erthe 7 

